program controlled input and output files.

[Raymond4141]

I am writing a program controlled file for pelles c and when I run it I get this error message ***processed returned 255***. I am running windows 7 as my os.

[frankie]

Sorry we miss the crystal ball here... 
Post the code.
Merry Xmas

[Raymond4141]

Sorry bout that,
Here is the code:
      #Include <stdio.h>
      #define KMS_PER_MILE  1.609

int
main (void)
{
    double miles,kms;
     FILE   *inp,*outp;

inp = fopen ("c: distance.txt", "r");
outp = fopen ("c: distout.txt", "w");

fscanf (inp, "%lf", &miles);
fprintf(outp, "The distance in miles is %.2f.\n", miles);

kms = KMS_PER-MILE * miles;

fprintf (outp, "That equals %.2f kilometers.\n", kms);

fclose(inp);
fclose (outp);

return (0);
}


The code when ran crashes and outputs error message ***process returns 255***.
Thanks for any help you can give in advance.

[frankie]

Just for Xmas the solution for an assignement 

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#include <stdio.h>
#define KMS_PER_MILE  1.609

int main (void)
{
double miles,kms;
FILE   *inp,*outp;

inp = fopen ("distance.txt", "r");
if (!inp) //Chek if opening was ok!!!!
{
printf("Can't open input file!\nProgram will terminate\n");
return -1;
}

outp = fopen ("distout.txt", "w");
if (!outp) //Chek if opening was ok!!!!
{
printf("Can't open output file!\nProgram will terminate\n");
return -1;
}

fscanf (inp, "%lf", &miles);
fprintf(outp, "The distance in miles is %.2f.\n", miles);

kms = KMS_PER_MILE * miles;

fprintf (outp, "That equals %.2f kilometers.\n", kms);

fclose(inp);
fclose (outp);

return (0);
}


If you really wanto open files on C: root don't leave spaces!

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inp = fopen ("c:distance.txt", "r");
Not

Code Select Expand

inp = fopen ("c: distance.txt", "r");

[Bitbeisser]

Just for Xmas the solution for an assignement 

Code Select Expand


#include <stdio.h>
#define KMS_PER_MILE  1.609

int main (void)
{
double miles,kms;
FILE   *inp,*outp;

inp = fopen ("distance.txt", "r");
if (!inp) //Chek if opening was ok!!!!
{
printf("Can't open input file!\nProgram will terminate\n");
return -1;
}

outp = fopen ("distout.txt", "w");
if (!outp) //Chek if opening was ok!!!!
{
printf("Can't open output file!\nProgram will terminate\n");
return -1;
}

fscanf (inp, "%lf", &miles);
fprintf(outp, "The distance in miles is %.2f.\n", miles);

kms = KMS_PER_MILE * miles;

fprintf (outp, "That equals %.2f kilometers.\n", kms);

fclose(inp);
fclose (outp);

return (0);
}


If you really wanto open files on C: root don't leave spaces!

Code Select Expand

inp = fopen ("c:distance.txt", "r");
Not

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inp = fopen ("c: distance.txt", "r");

Close but no cigar!
This will (try to) open the file in the current folder on the C: drive, most likely that of the C compiler installation.

To access a file in the root of the C: drive you have to properly use a "\" after the drive designation "C:", so the right instruction would be

Code Select Expand

inp = fopen ("c:\distance.txt", "r");

Ralf 

[Raymond4141]

I tried all of them and the out put reads as follows:  Can't open input file and program will terminate.

[jj2007]

To access a file in the root of the C: drive you have to properly use a "\" after the drive designation "C:", so the right instruction would be

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inp = fopen ("c:\distance.txt", "r");

Are you sure you get c:\distance.txt with a single backslash?

[TimoVJL]

Previous topic was already here and a stupid question:
Have you that 'distance.txt' anywhere ?

If it is in C: root then this may work too:

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inp = fopen ("c:/distance.txt", "r");

[frankie]

He forgot to create the input file 

[Bitbeisser]

To access a file in the root of the C: drive you have to properly use a "\" after the drive designation "C:", so the right instruction would be

Code Select Expand

inp = fopen ("c:\distance.txt", "r");

Are you sure you get c:\distance.txt with a single backslash?

Oops  , of course not. Just had been working all day in Pascal, so I missed that. It needs to be of course

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inp = fopen ("c:\\distance.txt", "r");

Ralf

[Raymond4141]

I found and fixed the problem! All the help I got here was tremendous! The problems was with my computer. My hard drive was corrupted. That's why I was getting the *** processed returned 255***.
Once again thanks everyone for there help! Got a an 85% on my assignment!